K-ON!
| Opening | Cagayake! GIRLS |
| Ending | Don't say 'lazy' |
K-ON!!
| Opening | GO! GO! MANIAC |
| Opening 2 | Utauyo!! MIRACLE |
| Ending | Listen!! |
| Ending 2 | NO, Thank You! |
| Insert Song | Gohan wa Okazu |
| Insert Song | LOVE |
Kaiba
| Opening | Never |
| Ending | Carry Me Away |
Kaleido Star
| Opening | Take It Shake It |
| Opening 2 | Yakusoku no Basho e |
| Opening 3 | Tattoo Kiss |
| Ending | Real Identity |
| Ending 2 | Boku wa kokoni iru |
| Ending 3 | Escape |
Kamichama Karin
| Opening | Ankoku Tengoku |
| Ending | Anemone |
| Ending 2 | Kuuchuu Meiro |
Kamisama Dolls
| Opening | Kukanzen Nenshou |
| Ending | Switch ga Haittara |
Kampfer
| Opening | Unreal Paradise |
| Ending | One Way Ryou Omoi |
Kampfer fur die Liebe
| Opening | Choose my love! |
| Ending | Mousou Shoujo A |
Kanamemo
| Opening | Kimi he to Tsunagu Kokoro |
| Ending | YAHHO!! |
Kannagi - Crazy Shrine Maidens
| Opening | Motto Hade ni ne! |
Kanokon
| Opening | Phosphor |
| Ending | Koi no Honoo |
Kanokon ~Manatsu no Daishanikusai~ (OAV)
| Opening | Komorebi no Sordino |
| Ending | Lupinus ~ Shiawase no Kaze |
Kanon (H-Game)
| Opening | Last Regrets |
| Ending | Kaze no Tadori Tsuku Basho |
Kanon
| Opening | Florescence |
| Ending | Flower |
Kara no Kyoukai - The Garden of Sinners (Movie)
| Ending | Oblivious |
| Ending 2 | Kimi ga Hikari ni Kaete Yuku |
| Ending 3 | Kizuato |
| Ending 4 | ARIA |
| Ending 5 | Sprinter |
| Ending 6 | Fairytale |
| Ending 7 | Seventh heaven |
Karin
| Opening | Scarlet |
| Ending | Mou Hitotsu no Birthday |
Kasimasi ~Girl Meets Girl~
| Opening | Koi Suru Kokoro |
| Ending | Michishirube |
Katanagatari
| Opening | Meiya Kadenrou |
| Opening 2 | Katana to Saya |
| Ending | Tasogare no Gekka |
| Ending 2 | Refulgence |
| Ending 3 | Senbon Sennyo no Hamari Uta |
| Ending 4 | Kyomu no Hana |
| Ending 5 | Ai to Makoto |
| Ending 6 | Yuki no Onna |
| Ending 7 | Mayoigo Sagashi |
| Ending 8 | Karakuri Nemuridan |
| Ending 9 | Akashi |
| Ending 10 | Ina, to Hime wa Subete wo Karazu |
| Ending 11 | Bourei-tachi yo Yabou no Hate ni Nemure |
| Ending 12 | Toki sude ni hajimari wo kizamu |
Kawaii JeNny
| Opening | Rumika |
| Ending | High Energy |
Kazoku Keikaku (H-Game)
| Opening | Onaji Sora no Shita de |
Keitai Shoujo (ONA)
| Opening | Rensoku Jet |
| Ending | Mirai Angel |
KenIchi the Mightiest Disciple
| Opening | Be Strong |
| Opening 2 | Yahhoo! |
| Ending | Kimi ga Iru Kara |
| Ending 2 | Catch Your Dream |
| Ending 3 | RunOver |
| Ending 4 | Kokoro Kara no Message |
Kenko Zenrakei Suieibu Umisho
| Opening | Dolphin Jet |
| Ending | Splash BLUE ~Taiyou to Lemonade~ |
Key Princess Story Eternal Alice Rondo [Kagihime Monogatari - Eikyuu Alice Rondo]
| Opening | Little Primrose |
| Ending | Kioku Baraen |
Key the Metal Idol (OAV)
| Opening | In The Night |
| Opening | In The Night (English) |
| Ending | Watashi ga Soba ni Iru |
| Ending 2 | Galaxy in my Hands |
| Ending 2 | Galaxy in my Hands (English) |
| Key's Lullaby | |
| Key's Lullaby (English) |
Kiba
| Opening | Sanctuary |
| Opening 2 | Hakanaku Tsuyoku |
| Ending | Very Very |
| Ending 2 | Solar Wind |
| Ending 3 | Stay Gold |
| Ending 4 | Sekai no Hate Made |
Kiddy Girl-and
| Opening | Baby universe day |
| Ending | Taiyou no Tsuki |
| Ending 2 | Tsuki to Taiyou |
| Ending 3 | Magical Sakura-chan |
| Ending 4 | Yume demo Ii sa |
Kiddy Grade
| Opening | Mirai No Kioku |
| Ending | Future |
Kiki's Delivery Service (Movie) [Majo no Takkyuubin (Movie)]
| Opening | Rouge no Dengon |
| Ending | Yasashisa ni Tsutsumareta Nara |
King from Now On! [Kyo kara Maoh!]
| Opening | Hateshinaku Tooi Sora ni |
| Ending | Suteki na Shiawase |
| Ending 2 | Arigatou~ |
King of Bandit Jing
| Opening | Shout It Loud |
| Ending | Sha La La |
Kino's Journey - The Beautiful World [Kino no Tabi - The Beautiful World]
| Opening | All The Way |
| Ending | The Beautiful World |
Kishin Taisen Gigantic Formula
| Opening | United Force |
| Ending | Tsubasa |
Kiss X Sis (OAV)
| Opening | Futari no Honey Boy |
| Ending | Hoshizora Monogatari |
Kiss X Sis
| Opening | Balance KISS |
| Ending | Our Steady Boy |
Kobato
| Opening | Magic Number |
| Ending | Jellyfish no Kokuhaku |
| Ending 2 | Watashi ni Dekiru Koro |
| Ending 3 | Ashita Kuru Hi |
Kodomo no Jikan
| Opening | Rettsu! Ohime-sama Dakko |
| Ending | Hana Maru Sensation |
| Ending 2 | Otome Chikku Shoshinsha desu |
Kodomo no Jikan Nigakki (OAV)
| Opening | Guilty Future |
| Ending | 1, 2, 3 Day |
Koe de Oshigoto! (OAV)
| Opening | Koi no Mahou |
| Ending | Kuchihiru Chuck |
Koi Koi 7
| Opening | Super Love |
| Ending | Miracle |
Koihime Musou
| Opening | Flower of Bravery |
| Ending | Yappari Sekai wa Atashi Legend!! |
Kokoro Library [Kokoro Toshokan]
| Opening | Beagle |
| Ending | Tsuki wa Miteru |
Kono Aozora ni Yakusoku wo - Youkoso Tsugumi Ryouhe
| Opening | Kono Aozora ni Yakusoku wo |
| Ending | Aozora no Fantasia |
Kore wa Zombie Desu ka
Kujibiki Unbalance (OAV)
| Opening | Kujibiki Unbalance |
| Ending | Kagayaki Cyalume |
Kujibiki Unbalance
Kupuu!! Mamegoma!
| Opening | Thank You! wa I LOVE YOU |
| Ending | Jitensha ni Notte |
Kurau - Phantom Memory [Phantom Memory Kurau]
| Opening | Natsukashii Umi |
| Ending | Moonlight |
Kure-nai
| Opening | Love Jump |
| Ending | Crossing Days |
| Ending 2 | Tenohira no Taiyou |
Kurokami The Animation
| Opening | Sympathizer |
| Opening 2 | tRANCE |
| Ending | Irodori no Nai Sekai |
| Ending 2 | Gekkou no Chigiri |